A Potential transformer is commonly a "step-down" voltage transformer which lowers the voltage of a higher voltage circuit to a lower voltage circuit for the intention of measuring voltage. Potential transformers are connected across or parallel to the line which is being measured.
A potential transformer is commonly found in electrical metering situations, and is designed to allows it to monitor single-phase voltages and three-phase voltages. A potential transformer is also a kind of instrument transformer, known as a voltage transformer (VT).
A Potential Transformer is a special type of transformer that allows meters to take readings from electrical service connections with higher voltage (potential) than the meter is normally capable of handling without at potential transformer.
The primary terminals can be connected either in line-to-line or in line-to-neutral configuration. Fused transformer models are designated by a suffix of "F" for one fuse or "FF" for two fuses.
Essentially, there are three various types of potential transformers. This includes an electromagnetic type, a capacitor type, and an optical type. Optical potential transformers are used in optical equipment applications.
The capacitor type of potential transformer is typically utilized for higher voltages, whereas the electromagnetic potential transformer is a wire-round type of transformer. Typically, potential transformers combine both burden and accuracy, because they are normally dependent on each other. Most potential transformers have smaller cores and capacities, compared to regular power transformers.
Read Our Other Transformer Pages: Current Transformer Explained, Control Transformer Explained, Current Transformer Basics, Dry Type Transformers Explained, Isolation Transformer Explained, When To Use a Step Down Transformer